Network Cabinet Cable Management, Earthing and Front-to-Back Access

A cabinet full of active equipment is, from the installer's point of view, mostly a cable problem. If the cables have nowhere to go, they cross the airflow, block the doors and turn every future change into an archaeology project. Cable management and earthing are not accessories added to a cabinet; they are the reason the cabinet has the depth, the openings and the metalwork that it does.

Cable Management Is Why the Cabinet Has Depth

Entry, Entry Plates and Strain Relief

• Provide removable gland plates at the top and, where the site needs it, at the base.
• Size the entry for the cables plus spare, and keep the spare blanked.
• Provide strain relief at every entry, so that a pulled cable does not load a connector inside.
• Seal or brush the entry to limit air and dust transfer, especially where the cabinet sits in an airflow system.
• Keep the inside route from the entry to the first tie point defined, rather than leaving it to the installer.

Vertical and Horizontal Routing

• Provide vertical management on both sides, sized for the initial fill with margin.
• Provide horizontal routing at the top and bottom of each unit space, so a patch does not have to cross a face.
• Keep cables to the side of the equipment, not in front of it.
• Use radius limiters or guides where a cable would otherwise bend tighter than allowed.
• Provide tie points at sensible intervals, and never over-tighten a bundle.

Slack, Service Loops and Future Change

• Leave service loops at each end, long enough to pull a unit forward without disconnecting.
• Keep slack organised, not bundled into the airflow path.
• Provide space so that a future cable can be added without re-routing the existing ones.
• Route fibre with its own bend-radius discipline, which is stricter than copper.
• Record the route and the slack so that a later technician can follow it.

Separating Power, Data and Fibre

• Keep power and data physically separated along their runs, and maintain the separation through the entry.
• Route fibre away from sharp edges and from anything that moves.
• Where separation cannot be achieved, use the mitigation the electrical design specifies.
• Keep high-current cables away from signal bundles at the rear panel.
• Mark the separation requirement on the build, because it is invisible once the cabinet is full.

Bonding and Earthing

• Provide a main earth bar or terminal, sized and labelled for the installation.
• Bond every removable panel, door and gland plate with a dedicated conductor.
• Mask bonding faces before coating, so that the coating does not become the insulator.
• Keep bonding accessible for testing, and record the points on the drawing.
• Use hardware suited to the environment, particularly where the cabinet is in an industrial or coastal space.
• Bond cable trays and ladder racks where the installation design requires continuity between them.

Airflow, Doors and the Hot Aisle

• Keep the front and rear faces clear for air and for access.
• Provide brush or blanking provisions at unused unit spaces where the design calls for them.
• Remember that a full-height door of mesh or perforated metal still needs its frame to be stiff.
• Keep cable bundles out of the intake, because a bundle across an intake changes the airflow of the row.
• Provide space above and below where a cabinet is part of a hot-aisle or cold-aisle arrangement.

Front and Rear Access

• Decide early whether front-only or front-and-rear access is required, because it changes the door and the frame.
• Provide doors that open fully when the surrounding cabinets are installed and loaded.
• Provide locks and handles that suit the site's security requirement, and provide a keyed-alike or numbered scheme if asked.
• Keep service items reachable without removing the cabinet from the row.
• Provide labelling positions on the frame, because identification is part of service access.

Checks on the Build

How We Approach Cabinet Cable and Earth Provision

• We fabricate frames, doors, side and roof panels, gland plates, cable management brackets, earth bars and mounting rails in steel and stainless.
• We hold the openings, mounting patterns and bonding points to the arrangement drawings you supply.
• We will tell you when a requested cable volume, a requested airflow arrangement and a requested cabinet depth cannot all be met at once.
• We do not supply the PDUs, fans, cable managers, active equipment or the cabling itself, and we do not carry out the electrical installation or testing.
• Every quotation states which operations are completed in our plant.

Send the cable schedule, the airflow arrangement and the earthing requirement, and the cabinet can be built with the paths and the bonding already in it.

Frequently Asked Questions